Hello from the other coast. I hope you don't mind if I jump in on your thread.
I live in southeast coastal GA and fight the same battle every summer. This July I set up a couple of rotary sprinklers (Rain Birds) on 10 foot poles that are on timers. I thought about misters but the sprinklers cover a much larger (circular) area meaning I can get by with much fewer of them. They run for 3 minutes every hour from 10 AM to 5 PM. They seem to make a great difference in the stress the plants experience. We had several weeks in a row of mid to high 90's. I think the water from the sprinklers and it's cooling effect has been a treat for the bananas. (Since our humidity is much higher than yours I think you should see a much better cooling effect from any mist/water.) I also find my plants just seem to stop growing when the temps get that high.
